title: Mid-infrared dual-comb spectroscopy with an optical parametric oscillator.
abstract: We present the first implementation of mid-infrared dual-comb spectroscopy with an optical parametric oscillator. Methane absorption spectroscopy was demonstrated with a resolution of 0.2 cm(-1) (5 GHz) at an acquisition time of ~10.4 ms over a spectral coverage at 2900-3050 cm(-1). The average power from each individual mid-infrared comb line was ~1 μW, representing a power level much greater than typical difference-frequency-generation sources. Mid-infrared dual-comb spectroscopy opens up unique opportunities to perform broadband spectroscopic measurements with high resolution, high requisition rate, and high detection sensitivity.
authors.forename: Zhaowei
authors.initials: Z
authors.lastname: Zhang
authors.forename: Tom
authors.initials: T
authors.lastname: Gardiner
authors.forename: Derryck T
authors.initials: DT
authors.lastname: Reid
mesh_terms: D000042:Absorption; D008697:Methane / Q000737:chemistry; D055620:Optical Phenomena; D013055:Spectrophotometry, Infrared / Q000379:methods*
chemical_list: D008697:Methane